As a child I attended a chess club. There were no lessons. People simply played chess against each other.

I learned less in my entire years there than I did later in life in reading chess tips such as this page.

lichess.org/study/y14Z6s3N/A9uqbWxr

Looking back at those games I could recognize ways in which I was beaten by two moves in hindsight. But I had no idea about macro such as controlling the center or moving out the knights early were generally advantageous moves.